I have a Harmon Kardon Dolby Digital Decoder (ADP303) that was used in conjunction with a HK AVR80 receiver that was purchased in the late 1990's. The receiver is going on the fritz and I am about to replace it. For those more technologically inclined, am I correct in my thinking that this digital decoder is now pretty much obsolete and of no use with today's more advanced AVR's? Thanks!